Fuel-oil burner



A. J. FUETTER.

FUEL OIL BURNER. APPLICATION FILED JUNE 23, 1920.

Patented May 30, 1922..

M W 5 3 L m Mm w w 1 M 5:11? :5 w M a n w m section through the UNITED STATES ALBERT .1. comma, or cmvmann, orno.

rum-on. BURNER.

To all whom it may concern:

it known that vI, ALBERT J. FUETTER,-a citizen of the United States, residing at Cleveland in the county of Cuyahoga and State of (lhio, have invented a certain new and useful Improvement in'Fuel-Oil Burners, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates to iii of the concentric jet type.

An object of my invention is t construction and arrangement of nozzles 1n the burner in such manner that the efiicient atomization of the oil is effected by a whirling discharge of the atomizing agent. Anot ier object is the arrangement of the parts to provide for rapid and accurate relative adjustment of the nozzles. Other features and objects include a construction that is oil burners simple and capable of being cheaply manumay be readily assembled and that is durable in use.

In the drawings Fig. 1 is a side elevation of a burner constructed accordin to my invention; Fig. 2 is a central vertical section therethrough; Fig. 3 is a side elevation of one of the nozzle members showing the oil passageway and the spiral flutes on its exterior for imparting a whirling movement to the air discharge; Fig. 1 is a longitudinal same; and Fig. 5 is an factured, that taken apart, and

end view thereof.

' Referring to the drawing by numerals, 10 designates a nozzle cap having a central bore 11, with a restricted discharge opening 12. The exterior surface 12 of the cap is threaded as at 14, and provided with an annular flange 15 intermediate the ends. A. combustion hood 18 having an internal threaded flange 19 at its base is adapted to be threaded over the discharge end of the cap 10 in abutting engagement with the flange 15. The other end of the cap 10 is adapted to receive the threadedflange 20 of a member comprising a portion of an air conduit, the member shown comprising the hollow casting 21.

The member 21 may satisfactorily 'sups porta nozzle member complementary to the cap 10, such member, called the needle point, comprising a portion of an oil conduit, and being designated by the numeral 22. As shown, the wall 24 of the member 21 opposite the nozzle cap 10 is thickened and has an interiorly threaded opening 26in alignment Specification of Letters Patent. Application filed June 23,

'with the bore 11 of the 'tion of the member 22,

Patented May 30, 1922.

1920. Serial No. 390,993. g

nozzle cap, and adapted to receive the exteriorl portion 27 of the member 22,

connection the member 22 may be readily adjusted longitudinally with respect to the member 10 by applying a wrench to a squared portion 28 and turning the member 22 in either direction, thus causing its end to move into or away from the nozzle cap 10. The member 21, preferably comprising an threaded enlarged portion or the air supply conduit,

is connected with a valve 30 through pipes 31 and any suitable union 32. The member as an oil tight, rotatable engagement with an oil conduit, as shown comprising the threaded connection 33 with a casting 3 1-, connected through pipes 36 and a union 38 with a valve 39.

The member 22 comprising stricted discharge opening 12. The end poradapted to be positioned within the bore 11 of the nozzle cap 10, is reduced as at 43 and provided with spaced, spirally fluted, enlarged portions 424:. These flutes 44 cause air passing through the member 21 into the bore 11 to be whirled as it passes over the extreme tip 45 of the member 22 into proximity with the stream of oil discharged from the orifice 42 of the member 22, and causes a very efiicient atomization of oil in the passageway 12 of the nozzle cap 10.

The combustion hood 18 has a lurality of spaced openings 18 to permit it e entrance of additional air sufflcient to support the ieliticent combustionof the fuel within the The casting 21 is shown having a chamber within the hollow boss 50 with an opening therein closed by .a threaded plug 52. By removal of this plug any impurities which may be ,in the member 21 may be easily blown out. If desired, air from a source under different pressure may be supplied to the burner through such opening. The casting 34 comprising a portion of the oil conduit is shown having a drain cook 54.

In use, air and oil may be supplied to theburner above described through cocks such as 30 and 39, either or both under pressure as desired. The oil flows. freely through the bore 40 of the member 22 to the reduced opening 42 from whence it emerges as a fine jet with considerable velocity. The air passes throu h the air conduit and into the bore 11 an around the exterior of the end L of the needle point, passing through the spiralgrooves 44 which cause it to discharge into the reduced bore 42, into proximity with the oil, in a rapidly whirling stream. The whirling discharge of the air under pressure atomizes the oil causing it to leave the nozzle in the form of a fine spray which may be e'fliciently burned; an additional supply of properly carryon combustion being drawn in through the openlngs 48 by the 1nector action'of the jet. Should the nozzle ecome clogged at'any time, the drain cock 54 may be removed and a fine wlre inserted through the member 22 .to remove the obstruction.

Having thus described my invention, I

. claim 1. In a fuel 01]. burner, a nozzle comprising two coaxial apertured members, means for supplying oil through one of the members and air through the other, a combustion hood on said nozzle and a conduit for supplying air to said nozzle, saidnozzle and said combustion chamber being coaxially arranged, said oil supplying member having spiral vanes thereon.

2. In a fuel oil burner, a nozzle member comprising a bod having an opening therethrough restricte at one end to form a discharge opening, said nozzle member having an annular flange intermediate its ends, a.

' combustion hood secured u on one end of the nozzle and an air con uit member sean oil supply cured upon the other end of the nozzle, said conduit member having a pair of openings, ipe extendlng through said conduit and a justably mounted in one of said 0 enings, said pipe having an aperture theret rough leading to a point adjacent said discharge opening and having two sets of spirally arranged vanes upon the periphery thereof and located within the opening in said nozzle, said second opening in the air conduit communicating with a source of air supply.

3. In a fuel oil burner, a nozzle member comprising a body having restricted discharge 0 ening and an enlarged chamber,

- said nozz e member having external threads thereon and having an annular flange intermediate the two ends, a combustion hood threaded upon one end of. the nozzle and an air conduit "member threaded upon the other end of the nozzle, said conduit mem ber having a pair of openings, an oil supply pipe adjustably mounted in one of said openings, said pipe having an aperture therein leading to a point a jacent said discharge opening and having spaced spirally arranged flanges upon the periphery thereon and located within said enlarged chamber, said second aperture in the air conduit com- .municating with the air supply and means on said oil feed pipe whereby the same may be adjusted to control the supply of air.

In testimony whereof, I hereunto aflix my signature.

ALBERT J. FUETTER. 

